Íslenskar landbúnaðarrannsóknir - 01.03.1970, Side 71

COLOUR INHERITANCE IN ICELANDIC SHEEP 69
TABLE 30
Proportion of tnales (p) out of total (n), classified according to colour
and type of birth. Nonwhite lambs only
Singles Twins Singles and twins
Colour code1) n P n P n P
02 + 06 358 0.461 588 0.459 946 0.460
03 + 07 59 0.372 82 0.500 141 0.446
04 + 08 108 0.519 202 0.500 310 0.506
05 + 09 512 0.473 738 0.493 1250 0.485
10 + 13 11 0.273 23 0.522 34 0.441
11 + 14 41 0.463 97 0.485 138 0.478
12 + 15 4 0.500 5 0.200 9 0.333
Total 1093 0.466 1735 0.481 2828 0.476
Pigment type:
Black 959 0.463 1485 0.481 2444 0.474
Brown 134 0.485 250 0.488 384 0.487
]) For explanation of colour code see p. 10.
TABLE 31
Comparisons of sex ratios in table 30
DF X2 Probability
Between colour patterns: Within singles 6 5.052 0.70 > P > 0.50
Within twins 6 3.709 0.80 > P> 0.70
Sum .... 12 8.761 0.80 > P > 0.70
Singles and twins combined 6 3.916 0.70 > P > 0.50
Het.. between singles and twins 6 4.845 0.70 >P> 0.50
Between pigment types (black vs. brown): Within singles 1 0.230 0.70 > P > 0.50
Within twins 1 0.045 0.90 > P > 0.80
Sum .... 2 0.275 0.90 > P > 0.80
Singles and twins combined 1 0.229 0.70 > P > 0.50
Het. between singles and twins 1 0.046 0.90 >P> 0.80
Between singles and twins 1 0.702 0.50 > P > 0.30